﻿<?xml version="1.0" encoding="UTF-8"?>
<xs:schema targetNamespace="urn:ietf:params:xml:ns:reginfo"
xmlns:tns="urn:ietf:params:xml:ns:reginfo"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
elementFormDefault="qualified" attributeFormDefault="unqualified">
  <!-- This import brings in the XML language attribute xml:lang-->
  <xs:import namespace="http://www.w3.org/XML/1998/namespace"
schemaLocation="http://www.w3.org/2001/03/xml.xsd"/>
  <xs:element name="reginfo">
    <xs:complexType>
      <xs:sequence>
        <xs:element ref="tns:registration" minOccurs="0"
   maxOccurs="unbounded"/>
        <xs:any namespace="##other" processContents="lax" minOccurs="0"
   maxOccurs="unbounded"/>
      </xs:sequence>
      <xs:attribute name="version" type="xs:nonNegativeInteger"
  use="required"/>
      <xs:attribute name="state" use="required">
        <xs:simpleType>
          <xs:restriction base="xs:string">
            <xs:enumeration value="full"/>
            <xs:enumeration value="partial"/>
          </xs:restriction>
        </xs:simpleType>
      </xs:attribute>
    </xs:complexType>
  </xs:element>
  <xs:element name="registration">
    <xs:complexType>
      <xs:sequence>
        <xs:element ref="tns:contact" minOccurs="0" maxOccurs="unbounded"/>
        <xs:any namespace="##other" processContents="lax" minOccurs="0"
   maxOccurs="unbounded"/>
      </xs:sequence>
      <xs:attribute name="aor" type="xs:anyURI" use="required"/>
      <xs:attribute name="id" type="xs:string" use="required"/>
      <xs:attribute name="state" use="required">
        <xs:simpleType>
          <xs:restriction base="xs:string">
            <xs:enumeration value="init"/>
            <xs:enumeration value="active"/>
            <xs:enumeration value="terminated"/>
          </xs:restriction>
        </xs:simpleType>
      </xs:attribute>
    </xs:complexType>
  </xs:element>
  <xs:element name="contact">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="uri" type="xs:anyURI"/>
        <xs:element name="display-name" minOccurs="0">
          <xs:complexType>
            <xs:simpleContent>
              <xs:extension base="xs:string">
                <xs:attribute ref="xml:lang" use="optional"/>
              </xs:extension>
            </xs:simpleContent>
          </xs:complexType>
        </xs:element>
        <xs:element name="unknown-param" minOccurs="0"
   maxOccurs="unbounded">
          <xs:complexType>
            <xs:simpleContent>
              <xs:extension base="xs:string">
                <xs:attribute name="name" type="xs:string" use="required"/>
              </xs:extension>
            </xs:simpleContent>
          </xs:complexType>
        </xs:element>
        <xs:any namespace="##other" processContents="lax" minOccurs="0"
   maxOccurs="unbounded"/>
      </xs:sequence>
      <xs:attribute name="state" use="required">
        <xs:simpleType>
          <xs:restriction base="xs:string">
            <xs:enumeration value="active"/>
            <xs:enumeration value="terminated"/>
          </xs:restriction>
        </xs:simpleType>
      </xs:attribute>
      <xs:attribute name="event" use="required">
        <xs:simpleType>
          <xs:restriction base="xs:string">
            <xs:enumeration value="registered"/>
            <xs:enumeration value="created"/>
            <xs:enumeration value="refreshed"/>
            <xs:enumeration value="shortened"/>
            <xs:enumeration value="expired"/>
            <xs:enumeration value="deactivated"/>
            <xs:enumeration value="probation"/>
            <xs:enumeration value="unregistered"/>
            <xs:enumeration value="rejected"/>
          </xs:restriction>
        </xs:simpleType>
      </xs:attribute>
      <xs:attribute name="duration-registered" type="xs:unsignedLong"/>
      <xs:attribute name="expires" type="xs:unsignedLong"/>
      <xs:attribute name="retry-after" type="xs:unsignedLong"/>
      <xs:attribute name="id" type="xs:string" use="required"/>
      <xs:attribute name="q" type="xs:string"/>
      <xs:attribute name="callid" type="xs:string"/>
      <xs:attribute name="cseq" type="xs:unsignedLong"/>
    </xs:complexType>
  </xs:element>
</xs:schema>
